@jdaviescoates certainly horses for courses but different beasts.
We're working on replicating everything that Odoo does and more in WP & Woo but I started that epic challenge 4 years ago, and probably 20+ developers over the years,I'd say we're still only half-way there.
The central strength of Odoo is the accounting, CRUD standards & pivot tables. Odoo Studio is pretty phenomenal but not open-source.
Closest thing in WP-land is Advanced Customer Fields (ACF) but still it's been an epic challenge and we're still not done.
If I had my time again, I'd probably go Odoo + WP/Woo - but just can't resist a challenge when the prize is the world having a Website, Ecommerce & ERP System all-in-one that's genuinely FOSS for everything. One day π